题目内容

This has led to government concerns about supporting an increasing population of elderly people in the future.Synonyms:

查看答案

搜索结果不匹配？点我反馈

更多问题

For some single-child parents, the pressures of devoting time and energy to a second child can seem too overwhelming.Antonyms:

For other parents, the financial burden of having a second child may be the prime consideration.Synonyms:

Unfortunately, there is no simple answer to the question of whether or not to have a second child.Antonyms:

在Ig类别转化中,能诱导IgE产生的主要细胞因子是( )

A. IL-4
B. TNF
C. IL-2
D. IL-1
E. IL-6